Paste table data from copying from excel/libreoffice, and change <br /> to newlines

paste_table_data_parse_newlines.js

/* Quick and dirty experiment:
 * Copy cells from a spreadsheet document (excel, libreoffice), and paste in a web page.
 * Replace the <br /> in the cells with new lines, so when getting the innerHTML or the textContent,
 * the result is "formatted".
 */
document.addEventListener("paste", evt => {
	const content = evt.clipboardData.getData("text/html");
	console.log("content:", content);
  const parser = new DOMParser();
  const doc = parser.parseFromString(content, "text/html");
  console.log("doc:", doc);
  const cells = doc.getElementsByTagName("td");
  const firstCell = cells[1];
  const newLine = document.createTextNode("*\n*");
  const brList = firstCell.getElementsByTagName("br");
  console.log("brList:", brList);
  Array.from(brList).map(n => n.parentNode.replaceChild(newLine.cloneNode(true), n));
  console.log("firstCell html:", firstCell.innerHTML);
  console.log("firstCell text:", firstCell.textContent);
}, false);